EXT4-fs warning (device loop0): ext4_xattr_inode_create:1479: refuse to create EA inode when umounting
------------[ cut here ]------------
1
WARNING: fs/ext4/xattr.c:1480 at ext4_xattr_inode_create fs/ext4/xattr.c:1480 [inline], CPU#0: syz-executor/6411
WARNING: fs/ext4/xattr.c:1480 at ext4_xattr_inode_lookup_create+0xb0c/0x1cf0 fs/ext4/xattr.c:1598, CPU#0: syz-executor/6411
Modules linked in:
CPU: 0 UID: 0 PID: 6411 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ext4_xattr_inode_create fs/ext4/xattr.c:1480 [inline]
RIP: 0010:ext4_xattr_inode_lookup_create+0xb0c/0x1cf0 fs/ext4/xattr.c:1598
Code: 8b 7c 24 18 e9 7a 03 00 00 e8 20 bf 2b ff 48 89 df 48 c7 c6 d7 3d ec 8d ba c7 05 00 00 48 c7 c1 a0 b4 e5 8b e8 85 13 fc ff 90 <0f> 0b 90 49 be 00 00 00 00 00 fc ff df 43 c6 44 34 0e f8 48 c7 c3
RSP: 0018:ffffc900026b73a0 EFLAGS: 00010246
RAX: 2b1377fc2d835100 RBX: ffff888078ffe000 RCX: 2b1377fc2d835100
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900026b7530 R08: ffffc900026b6fe7 R09: 1ffff920004d6dfc
R10: dffffc0000000000 R11: fffff520004d6dfd R12: 1ffff920004d6e88
R13: ffff88805ae5a8f8 R14: 0000000000000000 R15: ffff88805ae5a920
FS:  0000555563678500(0000) GS:ffff888125441000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeeacf2c30 CR3: 000000007ce98000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_xattr_block_set+0x229/0x2ad0 fs/ext4/xattr.c:1918
 ext4_xattr_move_to_block fs/ext4/xattr.c:2669 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2744 [inline]
 ext4_expand_extra_isize_ea+0x12cf/0x1ea0 fs/ext4/xattr.c:2832
 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6297
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6340 [inline]
 __ext4_mark_inode_dirty+0x45c/0x730 fs/ext4/inode.c:6418
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6450
 __mark_inode_dirty+0x3a4/0x1470 fs/fs-writeback.c:2609
 mark_inode_dirty_sync include/linux/fs.h:2217 [inline]
 sync_lazytime+0x141/0x2d0 fs/fs-writeback.c:1723
 iput+0x230/0xe80 fs/inode.c:1997
 __dentry_kill+0x1a2/0x5e0 fs/dcache.c:670
 shrink_kill+0xa9/0x2c0 fs/dcache.c:1147
 shrink_dentry_list+0x2e0/0x5e0 fs/dcache.c:1174
 shrink_dcache_tree+0xcf/0x310 fs/dcache.c:-1
 do_one_tree fs/dcache.c:1654 [inline]
 shrink_dcache_for_umount+0xa8/0x1f0 fs/dcache.c:1671
 generic_shutdown_super+0x6f/0x2d0 fs/super.c:624
 kill_block_super+0x44/0x90 fs/super.c:1725
 ext4_kill_sb+0x68/0xb0 fs/ext4/super.c:7459
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf1e99b797
Code: a2 c7 05 fc 6d 23 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffeeacf3288 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007faf1ea2d33b RCX: 00007faf1e99b797
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeeacf3340
RBP: 00007ffeeacf3340 R08: 00007ffeeacf4340 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeeacf43d0
R13: 00007faf1ea2d33b R14: 000000000001e7ab R15: 00007ffeeacf4410
 </TASK>